Most people think memory loss is something that just happens when they get older, but there are things that can be done at any age to maintain brain power, KETV-TV reported.

In fact, something as simple as stretching can have lasting effects.

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"The brain actually responds to our physical activity," said Dr. Jane Potter, the chief of geriatrics at the University of Nebraska Medical Center. "There have been studies looking at functional imaging of the brain -- the parts that light up in response to strength training and aerobic exercise."

Don McQuigg and Jim Nebel also know the importance of getting the body moving. They can be found working out the Home Instead Center for Successful Aging several times a week.

"I try and get out every day," said Nebel. "I think it's very important if you are retired. I think if you are able to get out, then get out and enjoy what's outside."

"I have a father-in-law who has dementia," said McQuigg. "I know you have to do something. You just can't sit around."

Potter said it doesn't matter what age a person is or if they aren't currently active. She said they should just be doing something.

Potter said being social is also important. She said group exercise classes are perfect.

A heart-healthy diet is also important for brain power. That includes a diet rich in fruits and vegetables. Potter said the fruits should be dark-skinned, such as pears, plums and grapes. The vegetables should be either dark green or yellow.

Virginia Davidsaver, 80, has taken the message to heart.

"A body in motion stays in motion. I really believe that," she said. "If I am idle, I can usually tell a difference. I really need to keep moving."

Potter said another way to boost brain power is for younger people to stay in school. She said studies show a higher level of education leads to better memory later in life.

Another tip -- middle-aged people should be active in a variety of activities.

Potter said sleep is also important. A person should get seven to eight hours of sleep a night no matter what their age. She said sleeping too much or too long is bad for both physical health and brain health.